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Growth and cell wall changes in rice coleoptiles

Fractionation of cell wall and changes in noncellulosic polysaccharides during intact growth

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Abstract

A fractionation of non-cellulosic sugars of Oryza sativa L. coleoptile cell walls was carried out and the composition of each fraction was studied during coleoptile growth.

Percentages of fractions extracted with boiling water and with oxalate (pectic substances) were almost constant throughout development. An increase in the K II hemicellulosic fraction (extracted with 24% KOH) content, and a decrease in the K I hemicellulosic fraction (extracted with 10% KOH) were detected, when coleoptile growth finished.

The percentage of glucose content in the K I hemicellulosic fraction was highest in young coleoptiles and lowest in old ones. Furthermore, a highly significant linear relationship between amounts of glucose and growth rate was obtained, while a inverse relationship between the amount of xylose and arabinose and growth rate was attained.

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Abbreviations

GLC:

gas liquid chromatography

IAA:

indole-3-acetic-acid

TFA:

trifluoroacetic acid

To :

minimum stress-relaxation time

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Authors and Affiliations

  1. Departamento de Fisiologia Vegetal, Facultad de Biologia, Universidad de Salamanca, Salamanca, Spain

    Emilia Labrador & Gregorio Nicolás

  2. Departamento de Fisiologia Vegetal, Facultad de Farmacia, Universidad de Salamanca, Salamanca, Spain

    Ignacio Zarra

Authors
  1. Emilia Labrador
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  2. Ignacio Zarra
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  3. Gregorio Nicolás
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Labrador, E., Zarra, I. & Nicolás, G. Growth and cell wall changes in rice coleoptiles. Plant Cell Reports 1, 73–76 (1981). https://doi.org/10.1007/BF00269278

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  • DOI: https://doi.org/10.1007/BF00269278

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